Centrifugal pump



1946- .1. w. SUMMERS CENTRIFUGAL PUMP Filed Oct. 1, 1943 3 Sheets-Sheet1 (707m WAYZIMWIJ;

INVENTOR.

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A'ITDRN EYE 1946- J. w. SUMMEIIRS 2,393,127

CENTRIFUGAL PUMP Filed 061;. l, 1943 3 Sheets-Sheet 3 INVENTOR.

(7070a W Summers, v

ATTURN EYS Patented Jan. 15, 1946 CENTRIFUGAL PUMP John William Summers,Kelowna, British Columbia, Canada Application October 1, 1943, SerialNo. 504,627

7 Claims. My invention relates to pumps, and has among its objects andadvantages the provision of an improved centrifugal pump.

In the accompanying drawings: Figure 1 is an elevational view of thepump. Figure 2 is a top view. Figure 3 is an elevational viewillustrating the pump from a position inside a pressure tank.

Figure 4 is an enlarged sectional view along the line 6-6 of Figure 2. v

Figure 5 is a sectional view along the line 5-8 of Figure 4, and

Figure 6 is a reduced sectional view taken along the line @'6 of Figure4.

In the embodiment of the invention selected for illustration, I make useof a pump housing It comprising identical sections i2 provided withflanges It coacting with bolts it to secure the sections into a unitarystructure. Both sections are provided with flanges l8 bolted at 26 to aflange 22 on a neck 26 opening into a storage or pressure tank 26.

In Figure 4, the sections it include outwardly curved or dished endwalls 28 and curved side walls 30, the latter defining a single sidewall. Figure 2 illustrates the side walls it as extending throughout acurvature of slightly more than 180 degrees. The flanges it are slightlycurved when viewed accordin to Figure 2 in conformity of the curvatureof the surrounding area of the tank 29. Each section 52 also includes aninner wall 32 reversely dished with respect to the end wall 28 of thatsection. The inner walls 32 are of the same contours as the end walls 28when viewed according to Figure 6, since the walls it connect with sidewalls 3% constituting continuations of the flanges It. The walls 28, 30,32 and it may be welded into a unitary structure, but the sections l2are detachably connected by reason of the flanges It and the bolts it.

An impeller 86 is mounted in an impeller housing 38 located between theinner walls 32. This impeller comprises two identical sections 40separated by a thin metal wall 42. Figure 5 illustrates a face view ofone of the sections 40, the two being identical. Long blades or vanes 44are arranged radially of the axis of the impeller and connect with theimpeller hub- 46. These blades extend to the periphery of the plate 42,and the blades are reversely curved at 48 with respect to the directionof rotation of the impeller which is clockwise when viewing Figure 5.Spaced between the vanes 44 are shorter vanes 50 curved in conformitywith the vanes 48 and extending inwardly from the periphery of theimpeller to a short distance from the hub 46. Progressivelyshorter'vanes 52 and 54 are arranged between the vanes ill and 46.

In Figure 4, the two hubs 46 are mounted on a shaft st rota'tablysupported in thrust bearings 68 carried by brackets 60 bolted to therespective end walls 28. The shaft 56 is positioned vertically andextends through packing glands 62 carried by the end walls 28.

A collar as is fixed to the shaft 56 and abuts one hub 46. A sleeve 66is mounted on the shaft and engagesthe otherhub 46. The two hubs and theplate 62 are clamped into a unitary structure by a nut 68 threaded onthe shaft 56 and abutting the sleeve 86.

The impeller housing 38 comprises two walls 70 of identical constructionand of dished formation to closely house the impeller sections Gil, theblades of which are tapered in accordance with Figure 4. Both walls illhave inturned peripheral margins l2 spaced to constitute an outletextending circumferentially about the impeller throughout 360 degrees.

Between the flat areas It of the wall 32 and the walls 70 are interposedsealing means It, and all these parts are secured into a unitarystructure by bolts it. All the walls 32 and 10 are provided with inletopenings 86 arranged concentrically cf the shaft 56. The two inletopenings are of equal size. To each wall 28 is connected two water inletconduits 82, although one larger conduit for each inlet chamber 8toperatessatisiactorily.

A motor drives the shaft 58 and is mounted on a bracket 88 attached tothe tank It and additionally supported by a brace 90 attached to thelowermost section l2.

The impeller housing 38 extends partly through the neck 24, and theoutlet chamber 92 diverges radially of the impeller housing 38 andcommunicates with the neck 2t.

A pump in accordance with my invention is highly eflicient in terms ofcapacity by reason of the fact that the impeller housing include anoutlet extending circumferentially about the impeller throughout 360degrees.

The impeller is fed from both sides and the vane arrangement smallopenings 14 constituting air vents. an air releasing valve 88 isprovided in the top wall 2| so that any air trapped in the pump may bereleased to the atmosphere.

Without further elaboration, the foregoing will so iully explain myinvention, that others may, by applying current knowledge, readily adaptthe same for use under various conditions of service.

I claim:

1. The combination with a storage tank having an opening therein and aneck surrounding the opening, a pump housing mounted on the neck andhaving upper, lower and side walls, inner walls in the housing formingupper and lower inlet compartments, a centrifugal pump comprising animpeller, and a chamber between the inlet compartments for saidimpeller, said chamber being provided with an outlet extendingcircumferentially ot the impeller throughout 360 degrees andcommunicating with the opening in the storage tank.

2. The combination with a storage tank having an opening therein and aneck surrounding the opening, a pump housing mounted on the neck andhaving upper, lower and side walls, inner walls in the housing formingupper and lower inlet compartments, a centrifugal pump com.- prising animpeller, a chamber between the inlet compartments for said impeller,said chamber being provided with an outlet extending circumierentiallyoi the impeller throughout 360 degrees and communicating with theopening in the storage tank, and said inlet chambers communieating withsaid housing on opposite sides thereof and coaxially oi the axis ofrotation of the impeller.

8. The combination with a storage tank having an opening therein and aneck surroundin the opening, a pump housing mounted on the neck andhaving upper, lower and side walls, inner walls in the housing formingupper and lower inlet compartments, a centrifugal pump comprising animpeller, a chamber between the inlet compartments for said impeller,said chamber being provided with an outlet extending circumierentiallyoi the impeller throughout 360 deasoarav grees and communicating withthe opening in I the storage tank, said inlet chambers communicatingwith said housing on opposite'sides thereof and coaxially oi. the axisof rotation of the impeller, and inlets communicating with saidchamhers.

4. The invention described in claim 1 wherein said housing comprises twosections, means for adjusting said sections relatively to the impeller,said impeller being sectional, and a dividing wall between the sectionsof the impeller.

5. The invention described in claim 1 wherein said inlet chambers arelocated at opposite sides of said impeller housing, said housingcomprising two sections respectively connected with said inlet chambers,said impeller comprising two sections, and a dividing means between thetwo sections of the impeller.

8. The combination with a storage tank having an opening therein, a necksurrounding the opening, a pump housing having a wall adiacent to thetank and secured to the neck, and upper and lower walls and side wallsconnected with each other and with the first wall, inner walls in thehousing spaced from the upper and lower wall to divide said housing withupper and lower inlet compartments having inlet openings, an impeller,an impeller casing mounted between the inner walls and having spacedwalls giving an outlet completely about the periphery of the impellerand said impeller and easing partly extending through the neck and intothe tank, and an outlet chamber extending about the impeller casing andleading into the tank through the neck and opening therein.

. 7. The invention as defined in claim 6, wherein the respective innerand outer walls of the housing are oppositely curved in cross-section,and wherein the impeller casing walls are curved in cross-sectionopposite the direction of curvature of the inner walls, and wherein theoutlet about the impeller extends throughout 360 degrees, a portion ofwhich serves directly into the tank and the remainder into the outletchamber.

JOHN w. s.

